I don't rent movies either. I have an attic full of DVD's, videotapes, and laserdiscs, over 1000 titles in all. And since iTunes launched, I've been collecting digital films from them. The problem is their accessibility. And that *is* Apple's problem. Yes, Akamai provides hosting, but Apple contracted them. If Akamai cannot keep up with the demand, Apple is legally bound to find a solution. They have no choice in the matter.
At the end of the day, it comes down to a poor decision by Apple's management. We all screamed for the ability to download previous purchases, and we finally got it. But Apple chose to take it a step further and push everything to the streaming model, without ensuring they could handle the traffic.
As for the DNS issue, there's nothing to convince me of. Using 4.4.2.2 is illegal, unless you're a customer of Level-3 in the mid-western United States. I did try it briefly, but all that did was route traffic from Missouri. That's even further away, and slower than Boston. Google's public DNS works fine, but the results are identical to my own ISP. Both send me to the Boston server farms, which are overloaded. Sure, some users will get better results from Google *if* their ISP is incompetent, and doesn't host a proper DNS service. But that isn't the case here.
Re Amazon Prime, I've been using that service for years, but not to watch movies. I don't know why Amazon added that nonsense, frankly. The service was designed for one thing -- free two-day shipping, and discounted overnight shipping. Anything else is a shiny bauble, and pointless.